2020 GMC Sierra 1500 other problems
The 2020 GMC Sierra 1500 has 42 other complaints filed with NHTSA — 6% of the year's total, and roughly flat versus the prior model year.
42
Other complaints
6%
Share of year
0
Crash-involved
0
Related recalls
Other complaints by year
What owners report
“Rear window (the one that faces straight back towards bed of truck) is leaking⦠Havenât taken it in to dealership for repair because Iâve exceeded mileage so truck is no longer under warranty⦠Not sure how long itâs been leaking but Iâve recently noticed that water stains (runs) on the…”
Common questions
How many other complaints does the 2020 GMC Sierra 1500 have?
NHTSA has 42 complaints about the 2020 GMC Sierra 1500 other — 6% of all complaints filed for that model year.
Related
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.